Table 2. Items of the HU-DBI and percentages of “agree” responses of dental students in Year 1 and Year 5.

Item	Year 1 (N=153)	Year 5 (N=120)	p-value
1. I don't worry much about visiting the dentist.	18%	14%	NS
2. My gums tend to bleed when I brush my teeth.	31%	9%	***
3. I worry about the color of my teeth.	91%	90%	NS
4. I have noticed some white sticky deposits on my teeth.	19%	21%	NS
5. I use a child-sized toothbrush.	5%	8%	NS
6. I think that I cannot help having false teeth when I am old.	31%	16%	**
7. I am bothered by the color of my gums.	85%	92%	*
8. I think my teeth are getting worse despite my daily brushing.	13%	1%	***
9. I brush each of my teeth carefully.	89%	95%	NS
10. I have never been taught professionally how to brush.	18%	9%	*
11. I think I can clean my teeth well without using toothpaste.	9%	29%	***
12. I often check my teeth in a mirror after brushing.	89%	82%	NS
13. I worry about having bad breath.	96%	96%	NS
14. It is impossible to prevent gum disease with toothbrushing alone.	50%	54%	NS
15. I put off going to the dentist until I have toothache.	28%	6%	***
16. I have used a dye to see how clean my teeth are.	28%	69%	***
17. I use a toothbrush that has hard bristles.	36%	14%	***
18. I don't feel I've brushed well unless I brush with strong strokes.	33%	14%	***
19. I feel I sometimes take too much time to brush my teeth.	34%	30%	NS
20. I have had my dentist tell me that I brush very well.	57%	84%	***

NS=not significant

^*p<0.05,

^**p<0.01,

^***p<0.001